lpfc_scsi.c 37.2 KB
Newer Older
已提交
1 2
/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
3
 * Fibre Channel Host Bus Adapters.                                *
4
 * Copyright (C) 2004-2006 Emulex.  All rights reserved.           *
5
 * EMULEX and SLI are trademarks of Emulex.                        *
已提交
6
 * www.emulex.com                                                  *
7
 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
已提交
8 9
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
10 11 12 13 14 15 16 17 18 19
 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
已提交
20 21 22 23
 *******************************************************************/

#include <linux/pci.h>
#include <linux/interrupt.h>
24
#include <linux/delay.h>
已提交
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53

#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport_fc.h>

#include "lpfc_version.h"
#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_logmsg.h"
#include "lpfc_crtn.h"

#define LPFC_RESET_WAIT  2
#define LPFC_ABORT_WAIT  2


/*
 * This routine allocates a scsi buffer, which contains all the necessary
 * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
 * contains information to build the IOCB.  The DMAable region contains
 * memory for the FCP CMND, FCP RSP, and the inital BPL.  In addition to
 * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
 * and the BPL BDE is setup in the IOCB.
 */
static struct lpfc_scsi_buf *
54
lpfc_new_scsi_buf(struct lpfc_hba * phba)
已提交
55 56 57 58 59
{
	struct lpfc_scsi_buf *psb;
	struct ulp_bde64 *bpl;
	IOCB_t *iocb;
	dma_addr_t pdma_phys;
60
	uint16_t iotag;
已提交
61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83

	psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
	if (!psb)
		return NULL;
	memset(psb, 0, sizeof (struct lpfc_scsi_buf));
	psb->scsi_hba = phba;

	/*
	 * Get memory from the pci pool to map the virt space to pci bus space
	 * for an I/O.  The DMA buffer includes space for the struct fcp_cmnd,
	 * struct fcp_rsp and the number of bde's necessary to support the
	 * sg_tablesize.
	 */
	psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
							&psb->dma_handle);
	if (!psb->data) {
		kfree(psb);
		return NULL;
	}

	/* Initialize virtual ptrs to dma_buf region. */
	memset(psb->data, 0, phba->cfg_sg_dma_buf_size);

84 85 86 87 88 89 90 91
	/* Allocate iotag for psb->cur_iocbq. */
	iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
	if (iotag == 0) {
		pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
			      psb->data, psb->dma_handle);
		kfree (psb);
		return NULL;
	}
92
	psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
93

已提交
94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139
	psb->fcp_cmnd = psb->data;
	psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
	psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
							sizeof(struct fcp_rsp);

	/* Initialize local short-hand pointers. */
	bpl = psb->fcp_bpl;
	pdma_phys = psb->dma_handle;

	/*
	 * The first two bdes are the FCP_CMD and FCP_RSP.  The balance are sg
	 * list bdes.  Initialize the first two and leave the rest for
	 * queuecommand.
	 */
	bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
	bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
	bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
	bpl->tus.f.bdeFlags = BUFF_USE_CMND;
	bpl->tus.w = le32_to_cpu(bpl->tus.w);
	bpl++;

	/* Setup the physical region for the FCP RSP */
	pdma_phys += sizeof (struct fcp_cmnd);
	bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
	bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
	bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
	bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
	bpl->tus.w = le32_to_cpu(bpl->tus.w);

	/*
	 * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
	 * initialize it with all known data now.
	 */
	pdma_phys += (sizeof (struct fcp_rsp));
	iocb = &psb->cur_iocbq.iocb;
	iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
	iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
	iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
	iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
	iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
	iocb->ulpBdeCount = 1;
	iocb->ulpClass = CLASS3;

	return psb;
}

140
static struct lpfc_scsi_buf*
141
lpfc_get_scsi_buf(struct lpfc_hba * phba)
已提交
142
{
143 144
	struct  lpfc_scsi_buf * lpfc_cmd = NULL;
	struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
145
	unsigned long iflag = 0;
146

147
	spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
148
	list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
149
	spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
150 151
	return  lpfc_cmd;
}
已提交
152

153 154 155
static void
lpfc_release_scsi_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
{
156
	unsigned long iflag = 0;
已提交
157

158
	spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
159
	psb->pCmd = NULL;
已提交
160
	list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
161
	spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
已提交
162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246
}

static int
lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
{
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct scatterlist *sgel = NULL;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
	struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
	dma_addr_t physaddr;
	uint32_t i, num_bde = 0;
	int datadir = scsi_cmnd->sc_data_direction;
	int dma_error;

	/*
	 * There are three possibilities here - use scatter-gather segment, use
	 * the single mapping, or neither.  Start the lpfc command prep by
	 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
	 * data bde entry.
	 */
	bpl += 2;
	if (scsi_cmnd->use_sg) {
		/*
		 * The driver stores the segment count returned from pci_map_sg
		 * because this a count of dma-mappings used to map the use_sg
		 * pages.  They are not guaranteed to be the same for those
		 * architectures that implement an IOMMU.
		 */
		sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
		lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
						scsi_cmnd->use_sg, datadir);
		if (lpfc_cmd->seg_cnt == 0)
			return 1;

		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
			printk(KERN_ERR "%s: Too many sg segments from "
			       "dma_map_sg.  Config %d, seg_cnt %d",
			       __FUNCTION__, phba->cfg_sg_seg_cnt,
			       lpfc_cmd->seg_cnt);
			dma_unmap_sg(&phba->pcidev->dev, sgel,
				     lpfc_cmd->seg_cnt, datadir);
			return 1;
		}

		/*
		 * The driver established a maximum scatter-gather segment count
		 * during probe that limits the number of sg elements in any
		 * single scsi command.  Just run through the seg_cnt and format
		 * the bde's.
		 */
		for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
			physaddr = sg_dma_address(sgel);
			bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
			bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
			bpl->tus.f.bdeSize = sg_dma_len(sgel);
			if (datadir == DMA_TO_DEVICE)
				bpl->tus.f.bdeFlags = 0;
			else
				bpl->tus.f.bdeFlags = BUFF_USE_RCV;
			bpl->tus.w = le32_to_cpu(bpl->tus.w);
			bpl++;
			sgel++;
			num_bde++;
		}
	} else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
		physaddr = dma_map_single(&phba->pcidev->dev,
					  scsi_cmnd->request_buffer,
					  scsi_cmnd->request_bufflen,
					  datadir);
		dma_error = dma_mapping_error(physaddr);
		if (dma_error) {
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
				"%d:0718 Unable to dma_map_single "
				"request_buffer: x%x\n",
				phba->brd_no, dma_error);
			return 1;
		}

		lpfc_cmd->nonsg_phys = physaddr;
		bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
		bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
		bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
		if (datadir == DMA_TO_DEVICE)
			bpl->tus.f.bdeFlags = 0;
247 248
		else
			bpl->tus.f.bdeFlags = BUFF_USE_RCV;
已提交
249 250 251 252 253 254 255
		bpl->tus.w = le32_to_cpu(bpl->tus.w);
		num_bde = 1;
		bpl++;
	}

	/*
	 * Finish initializing those IOCB fields that are dependent on the
256 257 258
	 * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
	 * reinitialized since all iocb memory resources are used many times
	 * for transmit, receive, and continuation bpl's.
已提交
259
	 */
260
	iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
已提交
261 262 263 264 265 266 267 268
	iocb_cmd->un.fcpi64.bdl.bdeSize +=
		(num_bde * sizeof (struct ulp_bde64));
	iocb_cmd->ulpBdeCount = 1;
	iocb_cmd->ulpLe = 1;
	fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
	return 0;
}

269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289
static void
lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
{
	/*
	 * There are only two special cases to consider.  (1) the scsi command
	 * requested scatter-gather usage or (2) the scsi command allocated
	 * a request buffer, but did not request use_sg.  There is a third
	 * case, but it does not require resource deallocation.
	 */
	if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
		dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
				psb->seg_cnt, psb->pCmd->sc_data_direction);
	} else {
		 if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
			dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
						psb->pCmd->request_bufflen,
						psb->pCmd->sc_data_direction);
		 }
	}
}

已提交
290 291 292 293 294 295 296 297 298 299
static void
lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
{
	struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
	struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
	struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
	uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
	uint32_t resp_info = fcprsp->rspStatus2;
	uint32_t scsi_status = fcprsp->rspStatus3;
300
	uint32_t *lp;
已提交
301 302
	uint32_t host_status = DID_OK;
	uint32_t rsplen = 0;
303
	uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
已提交
304 305 306 307 308 309 310 311 312 313 314

	/*
	 *  If this is a task management command, there is no
	 *  scsi packet associated with this lpfc_cmd.  The driver
	 *  consumes it.
	 */
	if (fcpcmd->fcpCntl2) {
		scsi_status = 0;
		goto out;
	}

315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333
	if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
		uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
		if (snslen > SCSI_SENSE_BUFFERSIZE)
			snslen = SCSI_SENSE_BUFFERSIZE;

		if (resp_info & RSP_LEN_VALID)
		  rsplen = be32_to_cpu(fcprsp->rspRspLen);
		memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
	}
	lp = (uint32_t *)cmnd->sense_buffer;

	if (!scsi_status && (resp_info & RESID_UNDER))
		logit = LOG_FCP;

	lpfc_printf_log(phba, KERN_WARNING, logit,
			"%d:0730 FCP command x%x failed: x%x SNS x%x x%x "
			"Data: x%x x%x x%x x%x x%x\n",
			phba->brd_no, cmnd->cmnd[0], scsi_status,
			be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
已提交
334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389
			be32_to_cpu(fcprsp->rspResId),
			be32_to_cpu(fcprsp->rspSnsLen),
			be32_to_cpu(fcprsp->rspRspLen),
			fcprsp->rspInfo3);

	if (resp_info & RSP_LEN_VALID) {
		rsplen = be32_to_cpu(fcprsp->rspRspLen);
		if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
		    (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
			host_status = DID_ERROR;
			goto out;
		}
	}

	cmnd->resid = 0;
	if (resp_info & RESID_UNDER) {
		cmnd->resid = be32_to_cpu(fcprsp->rspResId);

		lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
				"%d:0716 FCP Read Underrun, expected %d, "
				"residual %d Data: x%x x%x x%x\n", phba->brd_no,
				be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
				fcpi_parm, cmnd->cmnd[0], cmnd->underflow);

		/*
		 * The cmnd->underflow is the minimum number of bytes that must
		 * be transfered for this command.  Provided a sense condition
		 * is not present, make sure the actual amount transferred is at
		 * least the underflow value or fail.
		 */
		if (!(resp_info & SNS_LEN_VALID) &&
		    (scsi_status == SAM_STAT_GOOD) &&
		    (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
			lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
					"%d:0717 FCP command x%x residual "
					"underrun converted to error "
					"Data: x%x x%x x%x\n", phba->brd_no,
					cmnd->cmnd[0], cmnd->request_bufflen,
					cmnd->resid, cmnd->underflow);

			host_status = DID_ERROR;
		}
	} else if (resp_info & RESID_OVER) {
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
				"%d:0720 FCP command x%x residual "
				"overrun error. Data: x%x x%x \n",
				phba->brd_no, cmnd->cmnd[0],
				cmnd->request_bufflen, cmnd->resid);
		host_status = DID_ERROR;

	/*
	 * Check SLI validation that all the transfer was actually done
	 * (fcpi_parm should be zero). Apply check only to reads.
	 */
	} else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
			(cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
390
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
已提交
391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412
			"%d:0734 FCP Read Check Error Data: "
			"x%x x%x x%x x%x\n", phba->brd_no,
			be32_to_cpu(fcpcmd->fcpDl),
			be32_to_cpu(fcprsp->rspResId),
			fcpi_parm, cmnd->cmnd[0]);
		host_status = DID_ERROR;
		cmnd->resid = cmnd->request_bufflen;
	}

 out:
	cmnd->result = ScsiResult(host_status, scsi_status);
}

static void
lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
			struct lpfc_iocbq *pIocbOut)
{
	struct lpfc_scsi_buf *lpfc_cmd =
		(struct lpfc_scsi_buf *) pIocbIn->context1;
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
	struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
413 414 415
	int result;
	struct scsi_device *sdev, *tmp_sdev;
	int depth = 0;
已提交
416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448

	lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
	lpfc_cmd->status = pIocbOut->iocb.ulpStatus;

	if (lpfc_cmd->status) {
		if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
		    (lpfc_cmd->result & IOERR_DRVR_MASK))
			lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
		else if (lpfc_cmd->status >= IOSTAT_CNT)
			lpfc_cmd->status = IOSTAT_DEFAULT;

		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
				"%d:0729 FCP cmd x%x failed <%d/%d> status: "
				"x%x result: x%x Data: x%x x%x\n",
				phba->brd_no, cmd->cmnd[0], cmd->device->id,
				cmd->device->lun, lpfc_cmd->status,
				lpfc_cmd->result, pIocbOut->iocb.ulpContext,
				lpfc_cmd->cur_iocbq.iocb.ulpIoTag);

		switch (lpfc_cmd->status) {
		case IOSTAT_FCP_RSP_ERROR:
			/* Call FCP RSP handler to determine result */
			lpfc_handle_fcp_err(lpfc_cmd);
			break;
		case IOSTAT_NPORT_BSY:
		case IOSTAT_FABRIC_BSY:
			cmd->result = ScsiResult(DID_BUS_BUSY, 0);
			break;
		default:
			cmd->result = ScsiResult(DID_ERROR, 0);
			break;
		}

449 450 451
		if ((pnode == NULL )
		    || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
			cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
已提交
452 453 454 455 456 457 458 459 460 461 462 463 464 465 466
	} else {
		cmd->result = ScsiResult(DID_OK, 0);
	}

	if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
		uint32_t *lp = (uint32_t *)cmd->sense_buffer;

		lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
				"%d:0710 Iodone <%d/%d> cmd %p, error x%x "
				"SNS x%x x%x Data: x%x x%x\n",
				phba->brd_no, cmd->device->id,
				cmd->device->lun, cmd, cmd->result,
				*lp, *(lp + 3), cmd->retries, cmd->resid);
	}

467 468
	result = cmd->result;
	sdev = cmd->device;
469 470
	cmd->scsi_done(cmd);

471
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
472
		lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
473 474 475 476
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return;
	}

477
	if (!result && pnode != NULL &&
478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504
	   ((jiffies - pnode->last_ramp_up_time) >
		LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
	   ((jiffies - pnode->last_q_full_time) >
		LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
	   (phba->cfg_lun_queue_depth > sdev->queue_depth)) {
		shost_for_each_device(tmp_sdev, sdev->host) {
			if (phba->cfg_lun_queue_depth > tmp_sdev->queue_depth) {
				if (tmp_sdev->id != sdev->id)
					continue;
				if (tmp_sdev->ordered_tags)
					scsi_adjust_queue_depth(tmp_sdev,
						MSG_ORDERED_TAG,
						tmp_sdev->queue_depth+1);
				else
					scsi_adjust_queue_depth(tmp_sdev,
						MSG_SIMPLE_TAG,
						tmp_sdev->queue_depth+1);

				pnode->last_ramp_up_time = jiffies;
			}
		}
	}

	/*
	 * Check for queue full.  If the lun is reporting queue full, then
	 * back off the lun queue depth to prevent target overloads.
	 */
505
	if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529
		pnode->last_q_full_time = jiffies;

		shost_for_each_device(tmp_sdev, sdev->host) {
			if (tmp_sdev->id != sdev->id)
				continue;
			depth = scsi_track_queue_full(tmp_sdev,
					tmp_sdev->queue_depth - 1);
		}
		/*
 		 * The queue depth cannot be lowered any more.
		 * Modify the returned error code to store
		 * the final depth value set by
		 * scsi_track_queue_full.
		 */
		if (depth == -1)
			depth = sdev->host->cmd_per_lun;

		if (depth) {
			lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
				"%d:0711 detected queue full - lun queue depth "
				" adjusted to %d.\n", phba->brd_no, depth);
		}
	}

530
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
531
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
532 533 534 535 536 537 538 539 540 541 542 543 544
}

static void
lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
			struct lpfc_nodelist *pnode)
{
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
	struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
	int datadir = scsi_cmnd->sc_data_direction;

	lpfc_cmd->fcp_rsp->rspSnsLen = 0;
545 546
	/* clear task management bits */
	lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
已提交
547

548 549
	int_to_scsilun(lpfc_cmd->pCmd->device->lun,
			&lpfc_cmd->fcp_cmnd->fcp_lun);
已提交
550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628

	memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);

	if (scsi_cmnd->device->tagged_supported) {
		switch (scsi_cmnd->tag) {
		case HEAD_OF_QUEUE_TAG:
			fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
			break;
		case ORDERED_QUEUE_TAG:
			fcp_cmnd->fcpCntl1 = ORDERED_Q;
			break;
		default:
			fcp_cmnd->fcpCntl1 = SIMPLE_Q;
			break;
		}
	} else
		fcp_cmnd->fcpCntl1 = 0;

	/*
	 * There are three possibilities here - use scatter-gather segment, use
	 * the single mapping, or neither.  Start the lpfc command prep by
	 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
	 * data bde entry.
	 */
	if (scsi_cmnd->use_sg) {
		if (datadir == DMA_TO_DEVICE) {
			iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
			iocb_cmd->un.fcpi.fcpi_parm = 0;
			iocb_cmd->ulpPU = 0;
			fcp_cmnd->fcpCntl3 = WRITE_DATA;
			phba->fc4OutputRequests++;
		} else {
			iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
			iocb_cmd->ulpPU = PARM_READ_CHECK;
			iocb_cmd->un.fcpi.fcpi_parm =
				scsi_cmnd->request_bufflen;
			fcp_cmnd->fcpCntl3 = READ_DATA;
			phba->fc4InputRequests++;
		}
	} else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
		if (datadir == DMA_TO_DEVICE) {
			iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
			iocb_cmd->un.fcpi.fcpi_parm = 0;
			iocb_cmd->ulpPU = 0;
			fcp_cmnd->fcpCntl3 = WRITE_DATA;
			phba->fc4OutputRequests++;
		} else {
			iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
			iocb_cmd->ulpPU = PARM_READ_CHECK;
			iocb_cmd->un.fcpi.fcpi_parm =
				scsi_cmnd->request_bufflen;
			fcp_cmnd->fcpCntl3 = READ_DATA;
			phba->fc4InputRequests++;
		}
	} else {
		iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
		iocb_cmd->un.fcpi.fcpi_parm = 0;
		iocb_cmd->ulpPU = 0;
		fcp_cmnd->fcpCntl3 = 0;
		phba->fc4ControlRequests++;
	}

	/*
	 * Finish initializing those IOCB fields that are independent
	 * of the scsi_cmnd request_buffer
	 */
	piocbq->iocb.ulpContext = pnode->nlp_rpi;
	if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
		piocbq->iocb.ulpFCP2Rcvy = 1;

	piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
	piocbq->context1  = lpfc_cmd;
	piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
	piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
}

static int
lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
			     struct lpfc_scsi_buf *lpfc_cmd,
629
			     unsigned int lun,
已提交
630 631 632 633 634 635
			     uint8_t task_mgmt_cmd)
{
	struct lpfc_sli *psli;
	struct lpfc_iocbq *piocbq;
	IOCB_t *piocb;
	struct fcp_cmnd *fcp_cmnd;
636
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
已提交
637 638
	struct lpfc_nodelist *ndlp = rdata->pnode;

639
	if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
已提交
640 641 642 643 644 645 646 647
		return 0;
	}

	psli = &phba->sli;
	piocbq = &(lpfc_cmd->cur_iocbq);
	piocb = &piocbq->iocb;

	fcp_cmnd = lpfc_cmd->fcp_cmnd;
648
	int_to_scsilun(lun, &lpfc_cmd->fcp_cmnd->fcp_lun);
已提交
649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673
	fcp_cmnd->fcpCntl2 = task_mgmt_cmd;

	piocb->ulpCommand = CMD_FCP_ICMND64_CR;

	piocb->ulpContext = ndlp->nlp_rpi;
	if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
		piocb->ulpFCP2Rcvy = 1;
	}
	piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);

	/* ulpTimeout is only one byte */
	if (lpfc_cmd->timeout > 0xff) {
		/*
		 * Do not timeout the command at the firmware level.
		 * The driver will provide the timeout mechanism.
		 */
		piocb->ulpTimeout = 0;
	} else {
		piocb->ulpTimeout = lpfc_cmd->timeout;
	}

	return (1);
}

static int
674
lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba,
675 676
		    unsigned  tgt_id, unsigned int lun,
		    struct lpfc_rport_data *rdata)
已提交
677 678
{
	struct lpfc_iocbq *iocbq;
679
	struct lpfc_iocbq *iocbqrsp;
已提交
680 681
	int ret;

J
James Smart 已提交
682 683 684
	if (!rdata->pnode)
		return FAILED;

685
	lpfc_cmd->rdata = rdata;
686 687
	ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, lun,
					   FCP_TARGET_RESET);
已提交
688 689 690 691 692
	if (!ret)
		return FAILED;

	lpfc_cmd->scsi_hba = phba;
	iocbq = &lpfc_cmd->cur_iocbq;
693 694
	iocbqrsp = lpfc_sli_get_iocbq(phba);

已提交
695 696 697
	if (!iocbqrsp)
		return FAILED;

698 699 700 701 702 703 704
	/* Issue Target Reset to TGT <num> */
	lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
			"%d:0702 Issue Target Reset to TGT %d "
			"Data: x%x x%x\n",
			phba->brd_no, tgt_id, rdata->pnode->nlp_rpi,
			rdata->pnode->nlp_flag);

705 706 707
	ret = lpfc_sli_issue_iocb_wait(phba,
				       &phba->sli.ring[phba->sli.fcp_ring],
				       iocbq, iocbqrsp, lpfc_cmd->timeout);
已提交
708 709 710 711 712 713 714 715 716 717 718 719
	if (ret != IOCB_SUCCESS) {
		lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
		ret = FAILED;
	} else {
		ret = SUCCESS;
		lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
		lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
		if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
			(lpfc_cmd->result & IOERR_DRVR_MASK))
				lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
	}

720
	lpfc_sli_release_iocbq(phba, iocbqrsp);
已提交
721 722 723 724 725 726
	return ret;
}

const char *
lpfc_info(struct Scsi_Host *host)
{
727
	struct lpfc_hba    *phba = (struct lpfc_hba *) host->hostdata;
已提交
728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751
	int len;
	static char  lpfcinfobuf[384];

	memset(lpfcinfobuf,0,384);
	if (phba && phba->pcidev){
		strncpy(lpfcinfobuf, phba->ModelDesc, 256);
		len = strlen(lpfcinfobuf);
		snprintf(lpfcinfobuf + len,
			384-len,
			" on PCI bus %02x device %02x irq %d",
			phba->pcidev->bus->number,
			phba->pcidev->devfn,
			phba->pcidev->irq);
		len = strlen(lpfcinfobuf);
		if (phba->Port[0]) {
			snprintf(lpfcinfobuf + len,
				 384-len,
				 " port %s",
				 phba->Port);
		}
	}
	return lpfcinfobuf;
}

752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782
static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
{
	unsigned long  poll_tmo_expires =
		(jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));

	if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
		mod_timer(&phba->fcp_poll_timer,
			  poll_tmo_expires);
}

void lpfc_poll_start_timer(struct lpfc_hba * phba)
{
	lpfc_poll_rearm_timer(phba);
}

void lpfc_poll_timeout(unsigned long ptr)
{
	struct lpfc_hba *phba = (struct lpfc_hba *)ptr;
	unsigned long iflag;

	spin_lock_irqsave(phba->host->host_lock, iflag);

	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
		lpfc_sli_poll_fcp_ring (phba);
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

	spin_unlock_irqrestore(phba->host->host_lock, iflag);
}

已提交
783 784 785 786
static int
lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
{
	struct lpfc_hba *phba =
787
		(struct lpfc_hba *) cmnd->device->host->hostdata;
已提交
788 789 790
	struct lpfc_sli *psli = &phba->sli;
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
	struct lpfc_nodelist *ndlp = rdata->pnode;
791
	struct lpfc_scsi_buf *lpfc_cmd;
792 793
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
	int err;
已提交
794

795 796 797
	err = fc_remote_port_chkready(rport);
	if (err) {
		cmnd->result = err;
已提交
798 799 800 801
		goto out_fail_command;
	}

	/*
802 803
	 * Catch race where our node has transitioned, but the
	 * transport is still transitioning.
已提交
804
	 */
805 806 807
	if (!ndlp) {
		cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
		goto out_fail_command;
已提交
808
	}
809
	lpfc_cmd = lpfc_get_scsi_buf (phba);
已提交
810
	if (lpfc_cmd == NULL) {
811 812 813
		lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
				"%d:0707 driver's buffer pool is empty, "
				"IO busied\n", phba->brd_no);
已提交
814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836
		goto out_host_busy;
	}

	/*
	 * Store the midlayer's command structure for the completion phase
	 * and complete the command initialization.
	 */
	lpfc_cmd->pCmd  = cmnd;
	lpfc_cmd->rdata = rdata;
	lpfc_cmd->timeout = 0;
	cmnd->host_scribble = (unsigned char *)lpfc_cmd;
	cmnd->scsi_done = done;

	err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
	if (err)
		goto out_host_busy_free_buf;

	lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);

	err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
				&lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
	if (err)
		goto out_host_busy_free_buf;
837 838 839 840 841 842 843

	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
		lpfc_sli_poll_fcp_ring(phba);
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
844 845 846
	return 0;

 out_host_busy_free_buf:
847
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
848
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
849 850 851 852 853 854 855 856
 out_host_busy:
	return SCSI_MLQUEUE_HOST_BUSY;

 out_fail_command:
	done(cmnd);
	return 0;
}

857 858 859 860 861 862 863 864 865 866 867 868 869 870 871
static void
lpfc_block_error_handler(struct scsi_cmnd *cmnd)
{
	struct Scsi_Host *shost = cmnd->device->host;
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));

	spin_lock_irq(shost->host_lock);
	while (rport->port_state == FC_PORTSTATE_BLOCKED) {
		spin_unlock_irq(shost->host_lock);
		msleep(1000);
		spin_lock_irq(shost->host_lock);
	}
	spin_unlock_irq(shost->host_lock);
	return;
}
872

已提交
873
static int
874
lpfc_abort_handler(struct scsi_cmnd *cmnd)
已提交
875
{
876
	struct Scsi_Host *shost = cmnd->device->host;
877
	struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
已提交
878
	struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
879 880
	struct lpfc_iocbq *iocb;
	struct lpfc_iocbq *abtsiocb;
已提交
881 882 883
	struct lpfc_scsi_buf *lpfc_cmd;
	IOCB_t *cmd, *icmd;
	unsigned int loop_count = 0;
884
	int ret = SUCCESS;
已提交
885

886
	lpfc_block_error_handler(cmnd);
887
	spin_lock_irq(shost->host_lock);
已提交
888

889 890
	lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
	BUG_ON(!lpfc_cmd);
已提交
891

892 893 894 895 896 897 898 899 900 901
	/*
	 * If pCmd field of the corresponding lpfc_scsi_buf structure
	 * points to a different SCSI command, then the driver has
	 * already completed this command, but the midlayer did not
	 * see the completion before the eh fired.  Just return
	 * SUCCESS.
	 */
	iocb = &lpfc_cmd->cur_iocbq;
	if (lpfc_cmd->pCmd != cmnd)
		goto out;
已提交
902

903
	BUG_ON(iocb->context1 != lpfc_cmd);
已提交
904

905 906 907
	abtsiocb = lpfc_sli_get_iocbq(phba);
	if (abtsiocb == NULL) {
		ret = FAILED;
已提交
908 909 910 911
		goto out;
	}

	/*
912 913 914
	 * The scsi command can not be in txq and it is in flight because the
	 * pCmd is still pointig at the SCSI command we have to abort. There
	 * is no need to search the txcmplq. Just send an abort to the FW.
已提交
915 916
	 */

917 918 919 920 921
	cmd = &iocb->iocb;
	icmd = &abtsiocb->iocb;
	icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
	icmd->un.acxri.abortContextTag = cmd->ulpContext;
	icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
已提交
922

923 924 925 926 927 928
	icmd->ulpLe = 1;
	icmd->ulpClass = cmd->ulpClass;
	if (phba->hba_state >= LPFC_LINK_UP)
		icmd->ulpCommand = CMD_ABORT_XRI_CN;
	else
		icmd->ulpCommand = CMD_CLOSE_XRI_CN;
已提交
929

930 931 932 933 934 935
	abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
	if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
		lpfc_sli_release_iocbq(phba, abtsiocb);
		ret = FAILED;
		goto out;
	}
已提交
936

937 938 939
	if (phba->cfg_poll & DISABLE_FCP_RING_INT)
		lpfc_sli_poll_fcp_ring (phba);

940 941 942
	/* Wait for abort to complete */
	while (lpfc_cmd->pCmd == cmnd)
	{
943 944 945
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_sli_poll_fcp_ring (phba);

946
		spin_unlock_irq(phba->host->host_lock);
947
			schedule_timeout_uninterruptible(LPFC_ABORT_WAIT*HZ);
948 949
		spin_lock_irq(phba->host->host_lock);
		if (++loop_count
950
		    > (2 * phba->cfg_devloss_tmo)/LPFC_ABORT_WAIT)
951 952
			break;
	}
已提交
953

954 955 956 957 958 959 960 961
	if (lpfc_cmd->pCmd == cmnd) {
		ret = FAILED;
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
				"%d:0748 abort handler timed out waiting for "
				"abort to complete: ret %#x, ID %d, LUN %d, "
				"snum %#lx\n",
				phba->brd_no,  ret, cmnd->device->id,
				cmnd->device->lun, cmnd->serial_number);
已提交
962 963 964 965
	}

 out:
	lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
966 967
			"%d:0749 SCSI Layer I/O Abort Request "
			"Status x%x ID %d LUN %d snum %#lx\n",
968 969
			phba->brd_no, ret, cmnd->device->id,
			cmnd->device->lun, cmnd->serial_number);
已提交
970

971
	spin_unlock_irq(shost->host_lock);
已提交
972

973
	return ret;
974 975
}

已提交
976
static int
977
lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
已提交
978 979
{
	struct Scsi_Host *shost = cmnd->device->host;
980
	struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
981 982
	struct lpfc_scsi_buf *lpfc_cmd;
	struct lpfc_iocbq *iocbq, *iocbqrsp;
已提交
983 984
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
985
	uint32_t cmd_result = 0, cmd_status = 0;
已提交
986 987 988
	int ret = FAILED;
	int cnt, loopcnt;

989
	lpfc_block_error_handler(cmnd);
990
	spin_lock_irq(shost->host_lock);
J
James Smart 已提交
991
	loopcnt = 0;
已提交
992 993
	/*
	 * If target is not in a MAPPED state, delay the reset until
994
	 * target is rediscovered or devloss timeout expires.
已提交
995 996 997
	 */
	while ( 1 ) {
		if (!pnode)
J
James Smart 已提交
998
			return FAILED;
已提交
999 1000 1001

		if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
			spin_unlock_irq(phba->host->host_lock);
1002
			schedule_timeout_uninterruptible(msecs_to_jiffies(500));
已提交
1003
			spin_lock_irq(phba->host->host_lock);
J
James Smart 已提交
1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016
			loopcnt++;
			rdata = cmnd->device->hostdata;
			if (!rdata ||
				(loopcnt > ((phba->cfg_devloss_tmo * 2) + 1))) {
				lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
		   			"%d:0721 LUN Reset rport failure:"
					" cnt x%x rdata x%p\n",
		   			phba->brd_no, loopcnt, rdata);
				goto out;
			}
			pnode = rdata->pnode;
			if (!pnode)
				return FAILED;
已提交
1017
		}
J
James Smart 已提交
1018
		if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
已提交
1019 1020 1021
			break;
	}

1022
	lpfc_cmd = lpfc_get_scsi_buf (phba);
已提交
1023 1024 1025 1026 1027
	if (lpfc_cmd == NULL)
		goto out;

	lpfc_cmd->timeout = 60;
	lpfc_cmd->scsi_hba = phba;
1028
	lpfc_cmd->rdata = rdata;
已提交
1029

1030 1031
	ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, cmnd->device->lun,
					   FCP_LUN_RESET);
已提交
1032 1033 1034 1035 1036 1037
	if (!ret)
		goto out_free_scsi_buf;

	iocbq = &lpfc_cmd->cur_iocbq;

	/* get a buffer for this IOCB command response */
1038
	iocbqrsp = lpfc_sli_get_iocbq(phba);
已提交
1039 1040 1041
	if (iocbqrsp == NULL)
		goto out_free_scsi_buf;

1042 1043 1044 1045 1046
	lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
			"%d:0703 Issue LUN Reset to TGT %d LUN %d "
			"Data: x%x x%x\n", phba->brd_no, cmnd->device->id,
			cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);

1047 1048 1049
	ret = lpfc_sli_issue_iocb_wait(phba,
				       &phba->sli.ring[phba->sli.fcp_ring],
				       iocbq, iocbqrsp, lpfc_cmd->timeout);
已提交
1050 1051 1052
	if (ret == IOCB_SUCCESS)
		ret = SUCCESS;

1053 1054 1055 1056 1057

	cmd_result = iocbqrsp->iocb.un.ulpWord[4];
	cmd_status = iocbqrsp->iocb.ulpStatus;

	lpfc_sli_release_iocbq(phba, iocbqrsp);
已提交
1058 1059

	/*
1060
	 * All outstanding txcmplq I/Os should have been aborted by the device.
已提交
1061 1062 1063
	 * Unfortunately, some targets do not abide by this forcing the driver
	 * to double check.
	 */
1064 1065 1066 1067 1068 1069 1070 1071
	cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
				cmnd->device->id, cmnd->device->lun,
				LPFC_CTX_LUN);
	if (cnt)
		lpfc_sli_abort_iocb(phba,
				    &phba->sli.ring[phba->sli.fcp_ring],
				    cmnd->device->id, cmnd->device->lun,
				    0, LPFC_CTX_LUN);
已提交
1072
	loopcnt = 0;
1073
	while(cnt) {
已提交
1074
		spin_unlock_irq(phba->host->host_lock);
1075
		schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
已提交
1076 1077 1078
		spin_lock_irq(phba->host->host_lock);

		if (++loopcnt
1079
		    > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
已提交
1080
			break;
1081 1082 1083 1084 1085

		cnt = lpfc_sli_sum_iocb(phba,
					&phba->sli.ring[phba->sli.fcp_ring],
					cmnd->device->id, cmnd->device->lun,
					LPFC_CTX_LUN);
已提交
1086 1087 1088
	}

	if (cnt) {
1089
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
已提交
1090 1091
			"%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
			phba->brd_no, cnt);
1092
		ret = FAILED;
已提交
1093 1094 1095
	}

out_free_scsi_buf:
1096 1097
	lpfc_release_scsi_buf(phba, lpfc_cmd);

已提交
1098 1099 1100
	lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
			"%d:0713 SCSI layer issued LUN reset (%d, %d) "
			"Data: x%x x%x x%x\n",
1101 1102 1103
			phba->brd_no, cmnd->device->id,cmnd->device->lun,
			ret, cmd_status, cmd_result);

已提交
1104
out:
1105
	spin_unlock_irq(shost->host_lock);
已提交
1106 1107 1108
	return ret;
}

1109
static int
1110
lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
已提交
1111 1112
{
	struct Scsi_Host *shost = cmnd->device->host;
1113
	struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
已提交
1114 1115 1116 1117
	struct lpfc_nodelist *ndlp = NULL;
	int match;
	int ret = FAILED, i, err_count = 0;
	int cnt, loopcnt;
1118
	struct lpfc_scsi_buf * lpfc_cmd;
已提交
1119

1120
	lpfc_block_error_handler(cmnd);
1121 1122
	spin_lock_irq(shost->host_lock);

1123
	lpfc_cmd = lpfc_get_scsi_buf(phba);
已提交
1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135
	if (lpfc_cmd == NULL)
		goto out;

	/* The lpfc_cmd storage is reused.  Set all loop invariants. */
	lpfc_cmd->timeout = 60;
	lpfc_cmd->scsi_hba = phba;

	/*
	 * Since the driver manages a single bus device, reset all
	 * targets known to the driver.  Should any target reset
	 * fail, this routine returns failure to the midlayer.
	 */
1136
	for (i = 0; i < LPFC_MAX_TARGET; i++) {
已提交
1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
		/* Search the mapped list for this target ID */
		match = 0;
		list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
			if ((i == ndlp->nlp_sid) && ndlp->rport) {
				match = 1;
				break;
			}
		}
		if (!match)
			continue;

1148 1149
		ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba, i, cmnd->device->lun,
					  ndlp->rport->dd_data);
已提交
1150
		if (ret != SUCCESS) {
1151
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1152
				"%d:0700 Bus Reset on target %d failed\n",
已提交
1153 1154 1155 1156 1157
				phba->brd_no, i);
			err_count++;
		}
	}

1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172
	if (err_count == 0)
		ret = SUCCESS;

	lpfc_release_scsi_buf(phba, lpfc_cmd);

	/*
	 * All outstanding txcmplq I/Os should have been aborted by
	 * the targets.  Unfortunately, some targets do not abide by
	 * this forcing the driver to double check.
	 */
	cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
				0, 0, LPFC_CTX_HOST);
	if (cnt)
		lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
				    0, 0, 0, LPFC_CTX_HOST);
已提交
1173
	loopcnt = 0;
1174
	while(cnt) {
已提交
1175
		spin_unlock_irq(phba->host->host_lock);
1176
		schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
已提交
1177 1178 1179
		spin_lock_irq(phba->host->host_lock);

		if (++loopcnt
1180
		    > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
已提交
1181
			break;
1182 1183 1184 1185

		cnt = lpfc_sli_sum_iocb(phba,
					&phba->sli.ring[phba->sli.fcp_ring],
					0, 0, LPFC_CTX_HOST);
已提交
1186 1187 1188
	}

	if (cnt) {
1189
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
已提交
1190 1191
		   "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
		   phba->brd_no, cnt, i);
1192
		ret = FAILED;
1193
	}
已提交
1194 1195 1196 1197 1198 1199 1200

	lpfc_printf_log(phba,
			KERN_ERR,
			LOG_FCP,
			"%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
			phba->brd_no, ret);
out:
1201
	spin_unlock_irq(shost->host_lock);
已提交
1202 1203 1204 1205 1206 1207
	return ret;
}

static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
1208
	struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata;
已提交
1209
	struct lpfc_scsi_buf *scsi_buf = NULL;
1210
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
已提交
1211 1212 1213 1214
	uint32_t total = 0, i;
	uint32_t num_to_alloc = 0;
	unsigned long flags;

1215
	if (!rport || fc_remote_port_chkready(rport))
已提交
1216 1217
		return -ENXIO;

1218
	sdev->hostdata = rport->dd_data;
已提交
1219 1220 1221 1222

	/*
	 * Populate the cmds_per_lun count scsi_bufs into this host's globally
	 * available list of scsi buffers.  Don't allocate more than the
1223 1224 1225
	 * HBA limit conveyed to the midlayer via the host structure.  The
	 * formula accounts for the lun_queue_depth + error handlers + 1
	 * extra.  This list of scsi bufs exists for the lifetime of the driver.
已提交
1226 1227
	 */
	total = phba->total_scsi_bufs;
1228
	num_to_alloc = phba->cfg_lun_queue_depth + 2;
已提交
1229
	if (total >= phba->cfg_hba_queue_depth) {
1230 1231 1232
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
				"%d:0704 At limitation of %d preallocated "
				"command buffers\n", phba->brd_no, total);
已提交
1233 1234
		return 0;
	} else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1235 1236 1237 1238 1239 1240
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
				"%d:0705 Allocation request of %d command "
				"buffers will exceed max of %d.  Reducing "
				"allocation request to %d.\n", phba->brd_no,
				num_to_alloc, phba->cfg_hba_queue_depth,
				(phba->cfg_hba_queue_depth - total));
已提交
1241 1242 1243 1244
		num_to_alloc = phba->cfg_hba_queue_depth - total;
	}

	for (i = 0; i < num_to_alloc; i++) {
1245
		scsi_buf = lpfc_new_scsi_buf(phba);
已提交
1246
		if (!scsi_buf) {
1247 1248 1249
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
					"%d:0706 Failed to allocate command "
					"buffer\n", phba->brd_no);
已提交
1250 1251 1252
			break;
		}

1253
		spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
已提交
1254 1255
		phba->total_scsi_bufs++;
		list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1256
		spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
已提交
1257 1258 1259 1260 1261 1262 1263
	}
	return 0;
}

static int
lpfc_slave_configure(struct scsi_device *sdev)
{
1264
	struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata;
已提交
1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277
	struct fc_rport *rport = starget_to_rport(sdev->sdev_target);

	if (sdev->tagged_supported)
		scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
	else
		scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);

	/*
	 * Initialize the fc transport attributes for the target
	 * containing this scsi device.  Also note that the driver's
	 * target pointer is stored in the starget_data for the
	 * driver's sysfs entry point functions.
	 */
1278
	rport->dev_loss_tmo = phba->cfg_devloss_tmo;
已提交
1279

1280 1281 1282 1283 1284 1285
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
		lpfc_sli_poll_fcp_ring(phba);
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311
	return 0;
}

static void
lpfc_slave_destroy(struct scsi_device *sdev)
{
	sdev->hostdata = NULL;
	return;
}

struct scsi_host_template lpfc_template = {
	.module			= THIS_MODULE,
	.name			= LPFC_DRIVER_NAME,
	.info			= lpfc_info,
	.queuecommand		= lpfc_queuecommand,
	.eh_abort_handler	= lpfc_abort_handler,
	.eh_device_reset_handler= lpfc_reset_lun_handler,
	.eh_bus_reset_handler	= lpfc_reset_bus_handler,
	.slave_alloc		= lpfc_slave_alloc,
	.slave_configure	= lpfc_slave_configure,
	.slave_destroy		= lpfc_slave_destroy,
	.this_id		= -1,
	.sg_tablesize		= LPFC_SG_SEG_CNT,
	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
	.shost_attrs		= lpfc_host_attrs,
1312
	.max_sectors		= 0xFFFF,
已提交
1313
};